u 1 n 1 r 1 e 1 s 1 p 3 o 1 n 1 s 1 i 1 v 4 e 1 n 1 e 1 s 1 s 1 e 1 s 1
18 letters · 23 points in Scrabble
Meaning
noun the quality of being unresponsive; not reacting; as a quality of people, it is marked by a failure to respond quickly or with emotion to people or events